code: def __str__(self):
      return self.__repr__()
  
file_path: ffcv/ffcv/pipeline/pipeline_spec.py
imports: import torch
  from typing import List, Union
  from .operation import Operation
  from ..transforms.module import ModuleWrapper
  from ..transforms import ToTensor
label_desc: Use image node_id 3 for calling the PipelineSpec obj's underlying member method code with example usage: obj.__str__() and returns: self